Robust precoder design for massive MIMO with peak total power constrained single-RF-chain transmitters

Massive multiple-input multiple-output (MIMO) transmission/reception is a very promising enabling technique for future cellular systems. The performance of massive MIMO systems relies on the availability of channel state information (CSI) at the transmitter. However, due to estimation errors and del...

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Veröffentlicht in:IET communications Jg. 11; H. 17; S. 2667 - 2672
Hauptverfasser: Soleimani, Maliheh, Mazrouei-Sebdani, Mahmood, Elliott, Robert C, Krzymień, Witold A, Melzer, Jordan
Format: Journal Article
Sprache:Englisch
Veröffentlicht: The Institution of Engineering and Technology 30.11.2017
Schlagworte:
channel coding
channel state information
channel uncertainty
convex optimisation problem
convex programming
estimation errors
future cellular systems
load modulation
massive MIMO transmission
massive multiple‐input multiple‐output reception
mean square error minimisation
MIMO communication
peak total power constrained single‐RF‐chain transmitters
power amplifier
power efficiency
precoding
radio transmitters
Research Article
robust precoder design
signal‐to‐interference‐plus‐noise ratios
transmitter antennas
transmitting antennas
wireless channels
signal-to-interference-plus-noise ratios
power amplifier
load modulation
transmitting antennas
channel coding
convex optimisation problem
mean square error minimisation
channel state information
convex programming
channel uncertainty
precoding
robust precoder design
transmitter antennas
massive MIMO transmission
estimation errors
massive multiple-input multiple-output reception
peak total power constrained single-RF-chain transmitters
future cellular systems
radio transmitters
wireless channels
MIMO communication
power efficiency
ISSN:1751-8628, 1751-8636
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Zusammenfassung:Massive multiple-input multiple-output (MIMO) transmission/reception is a very promising enabling technique for future cellular systems. The performance of massive MIMO systems relies on the availability of channel state information (CSI) at the transmitter. However, due to estimation errors and delay this CSI is imperfect. Additionally, the use of many radio frequency (RF) chains to drive a large number of antennas at the transmitter quickly becomes impractical when that number increases. Thus, reducing the number of RF chains in massive MIMO systems is essential in order to reduce the system complexity and cost. Considering a massive MIMO system with a single-RF-chain transmitter, in this study, the authors design a precoding technique that is robust to the channel uncertainty. To reflect realistic restrictions in the authors' design, they consider the peak total transmitted power rather than the average power constraint. Also, they consider imperfect CSI and model the uncertainty region as a bounded one, which is a reasonable assumption. In this transmitter structure, there is only one power amplifier and load modulation rather than voltage modulation is used to generate the desired signals on the antenna elements. They demonstrate that when a very simple fixed equaliser is used at all user terminals, the problem of minimising the mean-square error of the received signals at user terminals under the worst-case channel uncertainty can be transformed into a convex optimisation problem. They provide simulation results and demonstrate that the proposed robust precoding technique outperforms non-robust techniques in terms of power efficiency and signal-to-interference-plus-noise ratios.
ISSN:1751-8628
1751-8636
DOI:10.1049/iet-com.2016.0552